Refractive changes during off-the-axis retinoscopy in myopia

Abstract

Purpose: To analyze the refractive shift during off-the-axis retinoscopy under cycloplegic drugs in myopic patients during ocular examination. Methods: Prospective cross-sectional study was carried out among 10 myopic patients having refractive errors of −3.00 D or less. All the subjects underwent cycloplegic refraction by a single examiner at 0°, 10°, and 20°. Descriptive data were analyzed as mean and standard deviation. Paired t-test was used to compare the mean differences between on-axis (0°) and off-axis (10° and 20°) retinoscopy. Result: The mean spherical equivalent refraction of 10 myopic patients showed an increase in myopic shift with approximately 7% and 18% for 10° and 20° of eccentricity, respectively. Similarly, the mean spherical equivalent measure on axis (0°) and off axis (10° and 20°) were -2.5495, −2.737, and −3.0265, respectively. The mean spherical equivalent differences between on-axis (0°) and off-axis (10° and 20°) showed statistically significant differences with P < 0.05. Conclusion: This study concluded that a greater degree of eccentricity will induce a greater amount of errors in retinoscopy.

Comments on: Refractive changes during off-the-axis retinoscopy in myopia

“…For an intriguing perspective on how off-axis retinoscopy generated the refractive error, I read the original study “Refractive changes during off-axis retinoscopy in myopia.”[ 1 ] I would like to congratulate the authors on the success of their original article.…”

Commentary: Renewed interest in off-axis retinoscopy and peripheral refraction for it’s role in control of myopia progression

“…Chaurasiya et al . [ 1 ] in their current study on “refractive changes during off-the-axis retinoscopy in myopia” and many other researchers, over the years have tried to quantify the error in the quantum of refractive error when this is measured with “off-axis” retinoscopy in routine clinical practice. Ferree et al .…”

Response to Comments on: Refractive Changes during off-the-axis retinoscopy in myopia

“…I would like to thank the authors for their interest and comments on the article “Refractive changes during off-the-axis retinoscopy in myopia”[ 1 ] and address their queries as follows. [ 2 ]…”

“…Firstly, the eccentricity was measured in the present study,[ 2 ] the reason being that 10° and 20° was labelled. Secondly, the induced myopia in our subjects were likely due to light rays passed through the lens obliquely, as mentioned in your comment and also supported by previous literature.…”